There are multiple ways to measure the bulk densityBulk density ofPetroleum coke calcined petroleum cokeCalcined Petroleum Cokes (CPC) (CPCCalcined Petroleum Cokes (CPC)), but the aluminumAluminum industryIndustry has been unable to agree on a common test/standard method. The tests are used to monitor the consistency of CPCCalcined Petroleum Cokes (CPC) quality and as a predictor of pitch demand and anodeAnode density in anodeAnode plants. Most methods suffer with poor reproducibility when results are compared between different laboratories. This paper will review some previous publications and present data from a recent detailed comparison of the different test methods across a wide range of samples over an extended time period. Whilst general correlations exist between the different test methods, some samples show poor correlation which highlights the challenge in using these tests for anything other than a high-level indicator of coke bulk densityBulk density/porosity.